Here is a demonstration on how to emulate "Predator" (movie) kind of vision-switch effects. Unfortunately we can only get green as basis, but combining it with different token visions still allows to switch different vision-bands (as in see different things). Ambient light color can be used to change contrast on top of this.



What we need now is a feature to allow "token FX" instead of just global FX. So that only the light range of each token light is affected by FX. This would also allow to create magical energy fields and fog light-effects around tokens that move with the token (similar to Foundry).